package com.wertop.viid.common.utils;

import java.util.Random;

/**
 * @Author admin
 * @Description RandomUtils
 * @Date 2020/5/25 15:46
 */
public class RandomUtils {
    /**
     * 产生随机IP地址
     * @return
     */
    public static String randomIp() {
        //ip范围
        int[][] range = {
                {607649792,608174079},
                //36.56.0.0-36.63.255.255
                {1038614528,1039007743},
                //61.232.0.0-61.237.255.255
                {1783627776,1784676351},
                //106.80.0.0-106.95.255.255
                {2035023872,2035154943},
                //121.76.0.0-121.77.255.255
                {2078801920,2079064063},
                //123.232.0.0-123.235.255.255
                {-1950089216,-1948778497},
                //139.196.0.0-139.215.255.255
                {-1425539072,-1425014785},
                //171.8.0.0-171.15.255.255
                {-1236271104,-1235419137},
                //182.80.0.0-182.92.255.255
                {-770113536,-768606209},
                //210.25.0.0-210.47.255.255
                {-569376768,-564133889},
                //222.16.0.0-222.95.255.255
        };
        Random rdint = new Random();
        int index = rdint.nextInt(10);
        String ip = num2ip(range[index][0]+new Random().nextInt(range[index][1]-range[index][0]));
        return ip;
    }

    public static String num2ip(int ip) {
        int [] b=new int[4] ;
        String x = "";
        b[0] = (int)((ip >> 24) & 0xff);
        b[1] = (int)((ip >> 16) & 0xff);
        b[2] = (int)((ip >> 8) & 0xff);
        b[3] = (int)(ip & 0xff);
        x=Integer.toString(b[0])+"."+Integer.toString(b[1])+"."+Integer.toString(b[2])+"."+Integer.toString(b[3]);
        return x;
    }
}
